2 Kings 11:21

Overview - 2 Kings 11
Jehoash, being saved by Jehosheba his aunt from Athaliah's massacre of the seed royal, is hid six years in the house of God.
Jehoiada, giving order to the captains, in the seventh year anoints him king.
13 Athaliah is slain.
17 Jehoiada restores the worship of God.
Treasury of Scripture Knowledge

2 Kings 11:21  (King James Version)
Seven years old was Jehoash when he began to reign.

4 ; 22:1 2 Chronicles 24:1-14